EP1835216B1 - Tuyau électriquement conducteur en plastique pour véhicule - Google Patents

Tuyau électriquement conducteur en plastique pour véhicule Download PDF

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Publication number
EP1835216B1
EP1835216B1 EP06005281A EP06005281A EP1835216B1 EP 1835216 B1 EP1835216 B1 EP 1835216B1 EP 06005281 A EP06005281 A EP 06005281A EP 06005281 A EP06005281 A EP 06005281A EP 1835216 B1 EP1835216 B1 EP 1835216B1
Authority
EP
European Patent Office
Prior art keywords
electrically conductive
tubing
plastic
section
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP06005281A
Other languages
German (de)
English (en)
Other versions
EP1835216A1 (fr
Inventor
Werner Dipl.-Ing. Zimmer
Iris Dipl.-Ing. Barthel
Torsten Dr. Otto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TI Automotive Fuldabruck GmbH
Original Assignee
TI Automotive Fuldabruck GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TI Automotive Fuldabruck GmbH filed Critical TI Automotive Fuldabruck GmbH
Priority to EP06005281A priority Critical patent/EP1835216B1/fr
Priority to AT06005281T priority patent/ATE537400T1/de
Priority to US11/684,448 priority patent/US7861746B2/en
Priority to JP2007064387A priority patent/JP5358062B2/ja
Publication of EP1835216A1 publication Critical patent/EP1835216A1/fr
Application granted granted Critical
Publication of EP1835216B1 publication Critical patent/EP1835216B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • F16L9/125—Rigid pipes of plastics with or without reinforcement electrically conducting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
    • F16L11/127—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting electrically conducting

Definitions

  • the invention relates to a motor vehicle pipeline made of plastic, wherein the inside of the pipe at least partially made of electrically conductive plastic, wherein at least one extending over only a portion of the circumference of the pipe extending portion of electrically conductive plastic is provided, which is connected to the electrically conductive inside of the pipe is connected, wherein the portion projects in the radial direction in a layer of non-conductive plastic, and wherein the portion extends at least partially in the longitudinal direction of the pipe.
  • Electrically conductive plastic means, in particular, a plastic matrix in which electrically conductive particles, for example carbon black particles or carbon fibers, are embedded.
  • a motor vehicle piping made of plastic of the embodiment described above is in the FR 2 194 545 described.
  • channels are provided in the interior, in which an aqueous dispersion of polytetrafluoroethylene is poured with a high content of graphite.
  • electrical charges can be derived.
  • the thus running parallel to the tube axis bands of conductive materials have a small cross-section relative to the pipe cross-section.
  • the DE 75 34 723 U1 describes inter alia a transparent plastic tube in electrically conductive or electroantistatic execution.
  • the tube is seen in cross-section to a substantial extent of a transparent mixture and the other part of a conductive or electroantistatic mixture. That is, the conductive area is designed as a pipe section, which extends from the pipe exterior to the pipe interior.
  • the electrically conductive plastic is a relatively expensive raw material compared to non-conductive plastic. Incidentally, the electrically conductive plastic influences the mechanical properties of the pipeline in a negative way. Larger amounts of electrically conductive plastic or larger layer thicknesses with electrically conductive plastic affect in particular the cold impact toughness of the pipeline.
  • a flare corresponds to a localized widening around the circumference of the pipeline widening of the pipeline, so that in the region of a flare both outer diameter and inner diameter of the pipeline is increased.
  • Such flare serve, for example, an axial fixation or positioning of the pipe in a clip on the vehicle chassis.
  • a crimp is usually worked into the tubing by cold or hot working after extrusion. The incorporation of such a flange creates stretched areas on the inside of the pipeline. Due to these strains, the distances of the electrically conductive particles present there increase and therefore the conductivity of the plastic in the stretched regions decreases or even is interrupted. This is an undesirable detrimental effect on the formation of flares in automotive piping.
  • the motor vehicle pipelines of the type mentioned above are also often by a rotary welding or vibration welding with other line elements, for example with a suitable end fitting connected.
  • a rotary welding or vibration welding with other line elements, for example with a suitable end fitting connected.
  • the inside of the pipe is involved and due to the abrasion occurring at the contact surfaces, the electrical conductivity can be undesirably impaired in particular in a thin conductive inner layer.
  • the invention the technical problem underlying a motor vehicle pipeline of the type mentioned above, in which the above-mentioned disadvantages can be avoided and in which a sufficient electrical conductivity, especially in critical areas (flare, welding points) is guaranteed long term.
  • Motor vehicle pipeline means in particular a pipeline for the passage of fuels.
  • Inner side of the pipeline means in the context of the invention, the inner surface of the pipe, which comes into contact with the flowing fluid medium, in particular with the fuel.
  • electrically conductive plastic means, in particular, a plastic matrix in which electrically conductive particles are embedded, for example soot particles or carbon fibers.
  • the fact that the electrically conductive section is connected to the electrically conductive inside of the pipeline also means that the electrically conductive section itself can form an electrically conductive region on the inside of the pipeline.
  • the fact that the electrically conductive portion protrudes in the radial direction partially into the layer of non-conductive plastic means that the portion only over a portion of the thickness or Layer thickness of the layer of the non-conductive plastic extends. In other words, the electrically conductive portion does not extend completely through this layer of non-conductive plastic, and in the radial direction a sub-layer of non-conductive plastic is always arranged over the electrically conductive portion.
  • the electrically conductive section extends over at least 40%, preferably over at least 45% and particularly preferably over at least 50% of the thickness of the non-conductive plastic layer.
  • the electrically conductive section extends over a maximum of 85%, preferably over a maximum of 80%, preferably over a maximum of 75%, very preferably over a maximum of 70% and particularly preferably over a maximum of 65% of the thickness of the electrically non-conductive plastic layer. It is within the scope of the invention for the electrically conductive section to extend into the middle region of the nonconductive plastic layer which is medium in relation to the wall thickness.
  • the area of the "neutral fiber” is the wall thickness average portion of the pipe wall, which is least affected by upsets and strains when the pipe is bent or crimped on the pipe. If the pipeline. comprises only one layer, the neutral fiber is in the middle of this layer with respect to the layer thickness. According to a preferred embodiment of the invention, the radial distance of the electrically conductive portion to the neutral fiber is 0 to 0.35 mm, preferably 0 to 0.3 mm, preferably 0 to 0.25 mm and very preferably 0 to 0.2 mm.
  • the electrically conductive section extends only over part of the circumference or inner circumference of the pipeline. It is within the scope of the invention that the electrically conductive section is over a maximum of 30%, preferably over a maximum of 20%, preferably over a maximum of 15%, very preferably over a maximum of 10% and particularly preferably over a maximum of 5% of the circumference or inner circumference of the pipeline extends.
  • the electrically conductive portion has expediently a rectangular, trapezoidal, round or semicircular cross-section.
  • the motor vehicle pipeline according to the invention is a multilayer pipeline. In other words, it is possible to connect further layers or plastic layers to the layer of non-conductive plastic.
  • the at least one electrically conductive portion forms the electrically conductive region of the inner side of the pipeline and the remaining region of the inner side of the pipeline consists of electrically non-conductive plastic.
  • the motor vehicle pipeline according to the invention is thus a Inner layer made of non-conductive plastic, which forms the majority of the inside of the pipeline.
  • At least one electrically conductive portion extends only over a portion of the circumference of the pipe and protrudes into the non-conductive inner layer.
  • a plurality of electrically conductive sections may be provided, which project into the inner layer and extend along the longitudinal direction of the pipeline. According to a particularly preferred embodiment of the invention, however, only a single electrically conductive portion is provided, which protrudes only partially into the non-conductive plastic layer.
  • the inner layer of the pipe is made of conductive plastic and to the outside of this conductive inner layer includes a layer of non-conductive plastic.
  • the portion of the conductive plastic is connected in this embodiment to the conductive inner layer and protrudes partially into the non-conductive plastic layer.
  • the conductive inner layer extends over the entire circumference or over the entire inner circumference of the motor vehicle pipeline.
  • the portion of the conductive plastic is integrally connected to the electrically conductive inner layer and partially protrudes into the non-conductive plastic layer.
  • the electrically conductive section expediently consists of the same material as the electrically conductive inner layer.
  • the radial thickness d of the electrically conductive portion more than half, preferably more than two thirds and very preferably more than three quarters of the radial thickness of the electrically conductive inner layer.
  • the radial thickness d of the electrically conductive portion is greater than the radial thickness of the electrically conductive inner layer.
  • Conductivity additives in particular carbon black particles, are embedded in the plastic matrix of the electrically conductive inner layer and the plastic matrix of the electrically conductive section.
  • the electrically conductive portion has a radial thickness d of at least 0.2 mm, preferably of at least 0.25 mm, preferably of at least 0.3 mm and very preferably of at least 0.35 mm.
  • the radial thickness d of the electrically conductive portion is at least 20%, preferably at least 25%, preferably at least 30% and very preferably at least 35% of the total wall thickness of the motor vehicle pipeline.
  • the electrically conductive portion extends at a crimp of the pipeline in the longitudinal direction of the pipeline.
  • Bördel means in the context of the invention, a local widening of the wall of the motor vehicle pipeline, which extends in particular over the entire circumference of the pipeline.
  • the inside of the pipe wall is stretched and thereby the electrically conductive particles have a greater distance from each other, so that in the known from the prior art pipelines often do not have the electrical conductivity more is guaranteed.
  • the invention is based on the finding that electrically conductive material, which ensures optimum electrical conductivity of the pipeline, is also present in less stretched regions of the pipeline wall, in particular in the region of the wall center of the pipeline wall, by the electrically conductive section according to the invention.
  • the electrically conductive portion extends in a Reibsch Trip Scheme the pipeline in the longitudinal direction of the pipeline.
  • the friction-welding region is an end of the pipeline which is to be connected via a rotary welding or vibration welding to a further pipeline element, in particular to a fitting.
  • the invention is based here on the finding that, due to the electrically conductive portion according to the invention, even after the welding and the associated abrasion of the plastic surfaces, there is still sufficient electrically conductive material to ensure optimum electrical conductivity of the pipeline. It is within the scope of the invention that the electrically conductive section consists exclusively of a material or consists essentially exclusively of a material which can participate in a friction-welded connection.
  • the electrically conductive portion forms an electrically conductive portion of the inside of the pipe
  • the radial thickness d of the electrically conductive portion is suitably greater than the radial thickness of the inner layer of the pipe, which is removed by abrasion during a friction welding operation.
  • the electrically conductive inner layer is preferably the sum of the radial thickness of the electrically conductive inner layer and of the radial thickness d of the electrically conductive portion greater than the radial thickness of the inner layer of the pipeline, which is removed in a friction welding by abrasion.
  • the invention is based on the finding that sufficient electrical conductivity of the pipeline is always ensured with the motor vehicle pipeline designed according to the invention. This also applies to places where a flare is incorporated in the motor vehicle pipeline or for areas of the motor vehicle pipeline, which are subjected to a rotary welding or vibration welding. Nevertheless, the automotive piping of the present invention can be manufactured in a simple and inexpensive manner. Insofar as the invention is based on the recognition that due to the inventive design of the motor vehicle pipeline, only a relatively small amount of electrically conductive plastic must be used and nonetheless that the electrical conductivity is ensured long term even in critical areas. This can be saved in an advantageous manner expensive raw material.
  • the motor vehicle pipeline according to the invention is also distinguished by excellent mechanical properties in comparison to electrically conductive pipelines known from the prior art. Thus, the pipeline according to the invention has a better cold impact toughness than many other known pipelines.
  • Fig. 1 is a section of a motor vehicle pipeline made of plastic, whose inner side 1 consists of electrically conductive plastic.
  • a flange 2 was produced by the wall of the motor vehicle pipeline was expanded to the outside.
  • the Fig. 2a and 2b show enlarged sections of the inside 1 and the inner wall of the motor vehicle pipeline.
  • electrically conductive particles 3 are embedded here.
  • the enlarged detail in Fig. 2a shows the state of the inner wall before the production of the bead 2.
  • the electrically conductive particles 3 only a small distance from each other, so that the electrical conductivity is ensured.
  • the Fig. 2b shows the state according to Fig. 1 after preparation of the flange 2.
  • the 2b shown region of the inner wall corresponds to the in Fig. 1 hatched marked areas of the inner wall. Due to the production of the flange 2, there was an expansion of plastic regions of the inner wall, so that the electrically conductive particles have a relatively large distance from each other and therefore a sufficient electrical conductivity is not always guaranteed.
  • the neutral fiber 7 has been indicated by dot-dash lines. This is the area of the pipe wall which is centered with respect to the wall thickness and does not experience any strains or compressions during the production of the flange 2.
  • the 3 and 4 show two embodiments of the motor vehicle pipeline according to the invention in cross section.
  • an electrically conductive section 4 is provided which forms the electrically conductive region of the inner side 1 of the pipeline.
  • the electrically conductive portion 4 consists of a plastic matrix in which electrically conductive particles 3 are embedded embedded.
  • the remaining area of the inner side 1 of the pipeline is made of electrically non-conductive plastic 5.
  • an inner layer 6 of non-conductive plastic 5 is provided which forms the majority of the inner side 1 of the pipeline.
  • the electrically conductive portion 4 protrudes into this inner layer 6, wherein according to the invention the electrically conductive portion 4 extends only over a part of the thickness of the inner layer 6.
  • the electrically conductive section 4 extends at least into the region of the neutral fiber 7.
  • the neutral fiber 7 lies in the region of the center of the wall of the inner layer 6, when the pipeline has only this inner layer 6 as a single layer. If the pipeline is a layer composite of several layers, the neutral fiber 7 is located in the overall wall thickness middle region of the pipeline wall. According to a variant embodiment with a corresponding layer thickness configuration, the neutral fiber 7 is then likewise located in the non-conductive inner layer 6.
  • the inner layer 6 of the pipeline is made of electrically conductive plastic. Adjoining this conductive inner layer 6 is a further layer 8 of electrically nonconductive plastic 5.
  • the electrically conductive section 4 is in this case integrally connected to the conductive inner layer 6 and protrudes into the electrically non-conductive layer 8. In this case, the electrically conductive section 4 expediently projects at least into the region of the layer 8 which is central in relation to the layer thickness.
  • the electrically conductive portion 4 extends over at least 40%, preferably over at least 45% and very preferably over at least 50% of the layer thickness of the layer 8. It is within the scope of the invention that the electrically conductive portion 4 is close to preferably extends into the region of the neutral fiber 7 of the pipe wall. If the tube wall is merely a layer composite of the electrically conductive inner layer 6 and the further layer 8 of electrically non-conductive plastic, the neutral fiber lies in the middle region of this layer composite with respect to the total wall thickness. If further layers connect to the layer 8, the neutral fiber 7 lies in the middle wall area of this layer aggregate with respect to the total wall thickness. According to a variant embodiment with a corresponding layer thickness configuration, the neutral fiber 7 for the above-mentioned cases lies in the layer 8 of electrically nonconductive plastic 5.
  • a motor vehicle pipeline according to the invention is also used in particular in a friction welding area according to the embodiments in FIGS 3 and 4 designed. Despite the friction welding and the surface abrasion associated therewith, sufficient conductance of the pipeline can nonetheless be maintained in the automotive piping of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Laminated Bodies (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Motor Power Transmission Devices (AREA)

Claims (7)

  1. Tuyauterie de véhicule automobile en plastique, dans laquelle le côté intérieur (1) de la tuyauterie est constitué au moins sur des portions d'un plastique électriquement conducteur,
    dans laquelle au moins une portion (4) s'étendant uniquement sur une partie de la circonférence de la tuyauterie, constituée d'un plastique électriquement conducteur est prévue,
    dans laquelle la portion (4) dépasse dans la direction radiale dans une couche de plastique (5) non conducteur,
    dans laquelle la portion (4) s'étend au moins sur des portions dans la direction longitudinale de la tuyauterie,
    dans laquelle la portion (4) est raccordée au côté intérieur (1) électriquement conducteur de la tuyauterie,
    dans laquelle la portion (4) s'étend uniquement sur une partie de l'épaisseur, resp. l'épaisseur de couche de la couche en plastique non conducteur,
    dans laquelle le plastique électriquement conducteur est une matrice plastique, dans laquelle les particules électriquement conductrices sont incorporées et
    dans laquelle la matrice plastique de la portion (4) électriquement conductrice est constituée d'une fluoropolymère ou d'un polyamide, dans laquelle le fluoropolymère est de l'ETFE ou PVdF.
    caractérisée en ce que la portion (4) électriquement conductrice s'étend au moins jusque dans une zone de la fibre neutre (7) de la paroi de tuyauterie.
  2. Tuyauterie de véhicule automobile selon la revendication 1, dans laquelle la au moins une portion (4) électriquement conductrice forme la zone électriquement conductrice du côté intérieur (1) de la tuyauterie et dans laquelle la zone restante du côté intérieur (1) de la tuyauterie est constituée d'un plastique (5) électriquement non conducteur.
  3. Tuyauterie de véhicule automobile selon la revendication 1, dans laquelle la couche interne (6) de la tuyauterie est constituée d'un plastique conducteur, dans laquelle à la couche interne conductrice (6) se rattache une couche de plastique (5) non conducteur et dans laquelle la portion (4) en plastique conducteur est rattachée à la couche interne conductrice et dépasse dans la couche plastique non conductrice.
  4. Tuyauterie de véhicule selon une des revendications 1 à 3, dans laquelle la portion électriquement conductrice (4) présente une épaisseur radiale d d'au moins 0,2mm, de préférence d'au moins 0,25mm et de manière préférée d'au oins 0,3mm.
  5. Tuyauterie de véhicule automobile selon une des revendications 1 à 4, dans laquelle l'épaisseur radiale d de la portion électriquement conductrice (4) correspond au moins à 20%, de préférence au moins 25%, de préférence au moins 30% et de manière très préférée au moins 35% de l'épaisseur de paroi totale de la tuyauterie de véhicule automobile.
  6. Tuyauterie de véhicule automobile selon une des revendications 1 à 5, dans laquelle la portion électriquement conductrice (4) s'étend au niveau d'un bord relevé (5) de la tuyauterie dans la direction longitudinale de la tuyauterie.
  7. Tuyauterie de véhicule selon une des revendications 1 à 6, dans laquelle la portion électriquement conductrice (4) s'étend dans une zone de soudage par friction de la tuyauterie dans la direction longitudinale de la tuyauterie.
EP06005281A 2006-03-15 2006-03-15 Tuyau électriquement conducteur en plastique pour véhicule Not-in-force EP1835216B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP06005281A EP1835216B1 (fr) 2006-03-15 2006-03-15 Tuyau électriquement conducteur en plastique pour véhicule
AT06005281T ATE537400T1 (de) 2006-03-15 2006-03-15 Electrisch leitfähige kraftfahrzeugrohrleitung aus kunststoff
US11/684,448 US7861746B2 (en) 2006-03-15 2007-03-09 Motor vehicle hose
JP2007064387A JP5358062B2 (ja) 2006-03-15 2007-03-14 合成物質から成る自動車配管

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06005281A EP1835216B1 (fr) 2006-03-15 2006-03-15 Tuyau électriquement conducteur en plastique pour véhicule

Publications (2)

Publication Number Publication Date
EP1835216A1 EP1835216A1 (fr) 2007-09-19
EP1835216B1 true EP1835216B1 (fr) 2011-12-14

Family

ID=36678520

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06005281A Not-in-force EP1835216B1 (fr) 2006-03-15 2006-03-15 Tuyau électriquement conducteur en plastique pour véhicule

Country Status (4)

Country Link
US (1) US7861746B2 (fr)
EP (1) EP1835216B1 (fr)
JP (1) JP5358062B2 (fr)
AT (1) ATE537400T1 (fr)

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US8524344B1 (en) * 2012-11-07 2013-09-03 GM Global Technology Operations PLLC Polymeric vessel
US9994208B2 (en) * 2014-02-21 2018-06-12 Shimano Inc. Bicycle hose structure
DE102014103479A1 (de) * 2014-03-14 2015-09-17 Veritas Ag Schlauchleitung für ein Fluid
US10359387B2 (en) * 2015-03-13 2019-07-23 Purdue Research Foundation Hydraulic hoses with life-sensing capability and methods therefor
IT201900006477A1 (it) * 2019-05-02 2020-11-02 Fluortubing Bv Struttura di tubo multistrato, particolarmente per fluidi

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EP1682803A1 (fr) * 2003-11-12 2006-07-26 Huber+Suhner Ag Tuyau servant a acheminer des milieux, en particulier pulverulents, generateurs de charges electrostatiques

Also Published As

Publication number Publication date
JP2007246084A (ja) 2007-09-27
US20070215229A1 (en) 2007-09-20
US7861746B2 (en) 2011-01-04
ATE537400T1 (de) 2011-12-15
JP5358062B2 (ja) 2013-12-04
EP1835216A1 (fr) 2007-09-19

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